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// Copyright 2014 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// ARGB making functions (SSE2 version).
//
// Author: Skal (pascal.massimino@gmail.com)
#include "./dsp.h"
#if defined(WEBP_USE_SSE2)
#include <assert.h>
#include <emmintrin.h>
#include <string.h>
static WEBP_INLINE uint32_t MakeARGB32(int a, int r, int g, int b) {
return (((uint32_t)a << 24) | (r << 16) | (g << 8) | b);
}
static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g,
const uint8_t* b, int len, uint32_t* out) {
if (g == r + 1) { // RGBA input order. Need to swap R and B.
int i = 0;
const int len_max = len & ~3; // max length processed in main loop
const __m128i red_blue_mask = _mm_set1_epi32(0x00ff00ffu);
assert(b == r + 2);
assert(a == r + 3);
for (; i < len_max; i += 4) {
const __m128i A = _mm_loadu_si128((const __m128i*)(r + 4 * i));
const __m128i B = _mm_and_si128(A, red_blue_mask); // R 0 B 0
const __m128i C = _mm_andnot_si128(red_blue_mask, A); // 0 G 0 A
const __m128i D = _mm_shufflelo_epi16(B, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i E = _mm_shufflehi_epi16(D, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i F = _mm_or_si128(E, C);
_mm_storeu_si128((__m128i*)(out + i), F);
}
for (; i < len; ++i) {
out[i] = MakeARGB32(a[4 * i], r[4 * i], g[4 * i], b[4 * i]);
}
} else {
assert(g == b + 1);
assert(r == b + 2);
assert(a == b + 3);
memcpy(out, b, len * 4);
}
}
//------------------------------------------------------------------------------
// Entry point
extern void VP8EncDspARGBInitSSE2(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitSSE2(void) {
VP8PackARGB = PackARGB;
}
#else // !WEBP_USE_SSE2
WEBP_DSP_INIT_STUB(VP8EncDspARGBInitSSE2)
#endif // WEBP_USE_SSE2
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